fastlane: Create temporary Keychain for iOS signing

This is a new approach to signing the iOS app by using a temporary
Keychain created only for that specific build and unlocked in advance.

By doing it this way we can avoid issues with `errSecInternalComponent`
appearing when there is no UI to open a Keychain password prompt when
running build in CI. I've described this problem in details in:
https://github.com/fastlane/fastlane/issues/15185

Thanks to `codesign:` partition ID being added to key partition list by
Fastlane `match` when importing a Keychain this approach now works:
https://github.com/fastlane/fastlane/pull/17456

Signed-off-by: Jakub Sokołowski <jakub@status.im>

ci/Jenkinsfile.android

@@ -1,4 +1,4 @@
-library 'status-react-jenkins@v1.2.5'
+library 'status-react-jenkins@v1.2.6'
 
 pipeline {
   agent { label 'linux' }

ci/Jenkinsfile.combined

@@ -1,4 +1,4 @@
-library 'status-react-jenkins@v1.2.5'
+library 'status-react-jenkins@v1.2.6'
 
 pipeline {
   agent { label 'linux' }

ci/Jenkinsfile.ios

@@ -1,4 +1,4 @@
-library 'status-react-jenkins@v1.2.5'
+library 'status-react-jenkins@v1.2.6'
 
 pipeline {
   agent { label 'macos-xcode-11.5' }

ci/Jenkinsfile.nix-cache

@@ -1,4 +1,4 @@
-library 'status-react-jenkins@v1.2.5'
+library 'status-react-jenkins@v1.2.6'
 
 pipeline {
   agent { label params.AGENT_LABEL }

ci/tools/Jenkinsfile.fastlane-clean

@@ -1,4 +1,4 @@
-library 'status-react-jenkins@v1.2.5'
+library 'status-react-jenkins@v1.2.6'
 
 pipeline {
   agent { label 'macos' }

ci/tools/Jenkinsfile.playstore-meta

@@ -1,4 +1,4 @@
-library 'status-react-jenkins@v1.2.5'
+library 'status-react-jenkins@v1.2.6'
 
 pipeline {
   agent { label 'linux' }

fastlane/Fastfile

@@ -11,18 +11,6 @@
 # There are a few env variables defined in the .env file in
 # this directory (fastlane/.env)
 
-# unlocks keychain if KEYCHAIN_PASSWORD variable is present
-# (to be used on CI machines)
-def unlock_keychain_if_needed
-  return unless ENV['KEYCHAIN_PASSWORD']
-
-  unlock_keychain(
-    path: 'login.keychain',
-    password: ENV['KEYCHAIN_PASSWORD'],
-    set_default: true
-  )
-end
-
 def curl_upload(url, file, auth, conn_timeout = 5, timeout = 60, retries = 3)
   rval = sh(
     'curl',
@@ -81,6 +69,38 @@ def upload_to_saucelabs(file)
   end
 end
 
+# Helper which acts like a Python context manager
+def with(ctx)
+    yield ctx.setup
+ensure
+    ctx.teardown
+end
+
+# Creates temporary keychain for build duration
+class Keychain
+  attr_accessor :name, :path, :pass
+
+  def initialize(name)
+    # We use epoch time to void clashes with CI builds
+    @name = "#{name}_#{Time.now.to_f}.keychain-db"
+    @path = "~/Library/Keychains/#{@name}"
+    @pass = rand().to_s
+    Fastlane::Actions::CreateKeychainAction.run(
+      name: @name,
+      password: @pass,
+      unlock: true,
+      # Lock it up after 25 minutes just in case we don't delete it.
+      timeout: 1500,
+      # To make Fastlane import WWDR certificate into it.
+      default_keychain: true,
+    )
+  end
+
+  # for use in with()
+  def setup; self end
+  def teardown; Fastlane::Actions::DeleteKeychainAction.run(name: @name) end
+end
+
 # builds an ios app with ad-hoc configuration and put it
 # to "status-ios" output folder
 # `readonly`:
@@ -95,12 +115,14 @@ def build_ios_adhoc(readonly: false, pr_build: false)
   scheme = pr_build ? 'StatusImPR' : 'StatusIm'
   app_id = pr_build ? 'im.status.ethereum.pr' : 'im.status.ethereum'
 
+  with Keychain.new('adhoc') do |kc|
     match(
       type: 'adhoc',
-    force_for_new_devices: true,
       readonly: readonly,
       app_identifier: app_id,
-    keychain_name: 'login.keychain'
+      force_for_new_devices: true,
+      keychain_name: kc.name,
+      keychain_password: kc.pass
     )
 
     build_ios_app(
@@ -120,6 +142,7 @@ def build_ios_adhoc(readonly: false, pr_build: false)
       }
     )
   end
+end
 
 # builds an ios app with e2e configuration and put it
 # to "status-ios" output folder
@@ -128,11 +151,13 @@ def build_ios_e2e
   showsdks_output = sh('xcodebuild', '-showsdks')
   simulator_sdk = showsdks_output.scan(/iphonesimulator\d\d?\.\d\d?/).first
 
+  with Keychain.new('adhoc') do |kc|
     match(
       type: 'adhoc',
-    force_for_new_devices: true,
       readonly: true,
-    keychain_name: 'login.keychain'
+      force_for_new_devices: true,
+      keychain_name: kc.name,
+      keychain_password: kc.pass
     )
 
     build_ios_app(
@@ -156,6 +181,7 @@ def build_ios_e2e
       # ...and we don't need an .ipa file for them, because we use .app directly
       skip_package_ipa: true
     )
+  end
 
   zip(
     path: 'status-ios/Build/Products/Release-iphonesimulator/StatusIm.app',
@@ -181,7 +207,6 @@ platform :ios do
   desc 'It creates an .ipa that can be used by a list of devices, registeded in the App Store Connect.'
   desc 'This .ipa is ready to be distibuted through diawi.com'
   lane :adhoc do
-    unlock_keychain_if_needed
     build_ios_adhoc(readonly: true)
   end
 
@@ -189,31 +214,30 @@ platform :ios do
   desc 'This lane is used for SauceLabs end-to-end testing.'
   desc 'It creates an .app that can be used inside of a iPhone simulator.'
   lane :e2e do
-    unlock_keychain_if_needed
     build_ios_e2e
   end
 
   desc '`fastlane ios pr` - makes a new pr build'
   desc 'This lane builds a new adhoc build and leaves an .ipa that is ad-hoc signed (can be uploaded to diawi)'
   lane :pr do
-    unlock_keychain_if_needed
     build_ios_adhoc(pr_build: true)
   end
 
   desc '`fastlane ios nightly` - makes a new nightly'
   desc 'This lane builds a new nightly and leaves an .ipa that is ad-hoc signed (can be uploaded to diawi)'
   lane :nightly do
-    unlock_keychain_if_needed
     build_ios_adhoc()
   end
 
   desc '`fastlane ios release` builds a release & uploads it to TestFlight'
   lane :release do
+    with Keychain.new('adhoc') do |kc|
       match(
         type: 'appstore',
         readonly: true,
         app_identifier: 'im.status.ethereum',
-      keychain_name: 'login.keychain'
+        keychain_name: kc.name,
+        keychain_password: kc.pass
       )
 
       build_ios_app(
@@ -230,6 +254,8 @@ platform :ios do
           "ITSAppUsesNonExemptEncryption": false
         }
       )
+    end
+
     upload_to_testflight(
       ipa: 'status-ios/StatusIm.ipa',
       skip_waiting_for_build_processing: true